an object with zero velocity can have an acceleration greater than zero. do you agree?

Question

velocity.

Answer 1

yes. like a pendulum. At the it's highest point of motion, the pendulum stops before falling again. At this point, velocity is zero and acceleration is maximumly non-zero. At the lowest point the velocity is at a maximum and the acceleration is at a minimum.

Answer 2

Yes, an object with zero velocity can have a non-zero acceleration.

Picture this; Toss a ball up in the air. Due to gravity, from the moment it leaves your hand until it hits the ground it will have a downward acceleration due to gravity of 32 ft/sec^2. As the ball rises it slows until it reaches its peak, at which point its velocity is zero, then begins falling down.

At the peak, when it has zero velocity, it still has a downward acceleration of 32 ft/sec^2.

If it had zero acceleration at zero velocity, the ball would just hang there in the air and not fall.

Answer 3

An object not moving cannot have an acceleration (depending on you reference frame). If you were to stand next to an object on the earth it would not look like it was moving, but if you could see it from space it would look like it was moving. Acceleration is defigned as the change in velocity with respect to the change in time. Having zero for a velocity is the same as having a constant velocity, either way you are not accelerating. However, I suppose that an object at rest is still undergoing gravitational acceleration.

Answer 4

It depends if you are talking about an instantaneous or continuous problem. An object can have an instantaneous velocity of zero but have a non-zero acceleration. If you are talking about a continuous problem, then no, an object with a zero velocity for all time cannot have a non-zero acceleration.

Answer 5

If the object is not moving (velocity) and if you do not FORCE it to move, it will not move, therefore it will continue to have a velosity of 0 until a foreign force acts upon it.